Twilight Zone Mystic Seer

myminifactory

News alert! Don't miss this: thermal printer upgrade\r\nSmall town diner, 1960, somewhere in the Twilight Zone.\r\nYoung ambitious William Shatner and his bride find themselves dropping pennies into a fortune-telling napkin dispenser, and slowly becoming dependent on its results. As that young couple manages to break free and live to captain starships, will you be so lucky?\r\nDo you dare face the Mystic Seer?!\r\nThis authentic-sized Mystic Seer is exactly like the original as I could determine. Pull the lever, watch the Seer's eyes flash with mystical insight, and receive a ticket that answers your most profound yes/no questions...\r\nOh, and does it serve napkins? Yes! There are loops on the inside of the napkin holes for elastic cord to lace over the white side panels so they'll put tension on the napkins once in place. Alternatively, simply insert the panels into the holes if there's no pressing need for napkin dispensing.\r\nAssembly\r\nHardware assembly should be pretty apparent from the photos. You will need:\r\nHardware:\r\nFour M3 hex nuts to insert into the case body, to hold the electronics mounts.\r\n20mm M3 bolt and M3 nylock nut for the lever assembly.\r\n9mm x 20mm compression spring for the lever return action.\r\nMasking tape to wrap around the dispenser wheel for grip on the cards\r\nTwo 9mm x 38mm compression springs for the card dispenser.\r\nFour 8mm M3 bolts to attach the motor to the dispenser\r\nThree 6mm M3 and one 12mm M3 bolt to attach the electronics brackets to the case\r\nElectronics:\r\n5mm LED for the Seer's illuminated eye\r\n13mm diameter press button to be activated by the lever\r\nAn arduino or similar microcontroller board\r\nNema 17 motor to dispense cards\r\nDRV8825 stepper driver or similar\r\n100 uF capacitor for the motor wiring\r\n10k ohm resistor for the button wiring\r\n300 ohm resistor for the LED wiring\r\nWires for connectivity\r\nA power supply for the microcontroller (probably 5V)\r\nA power supply for the motor (probably 12V)\r\nBefore you start collecting all those things, keep in mind that I used a 12V stepper with its own power because I already had those lying around. It's undoubtedly easier to just use a 5V motor! The electronics are pretty arbitrary as long as you can monitor a button, flash an LED, and drive a motor.\r\n \r\nWiring References\r\nSo, I was going to put my actual wiring diagram here, but it's probably safer to just link tutorials that will give you the wiring for each element anyway. That way, I avoid transcribing something wrong, and you won't blow up your board or power supply. Power supplies do blow up, trust me.\r\nArduino Code\r\nThe code is pretty basic: check the button, flash the eyes, activate the motor. Nothing too crazy. If you're using this code, though, double-check what's going on with those stepper definitions! And make sure the pin assignments match up with the pins you've chosen in the hardware.\r\n#include <Stepper.h>const int eyePin = 12;const int leverPin = 2;const int dirPin = 8;const int stepPin = 9;const int stepperPin3 = 10;const int stepperPin4 = 11;const int stepsPerRev = 120;Stepper dispenser(stepsPerRev, dirPin, stepPin, stepperPin3, stepperPin4);void setup() { pinMode(eyePin, OUTPUT); pinMode(leverPin, INPUT); dispenser.setSpeed(60);}void loop() { if (digitalRead(leverPin) == HIGH) { // no need to debounce, since this will take a few seconds to execute // do some flashy eye stuff for (int i=10; i>0; i--) { digitalWrite(eyePin, HIGH); delay(i*20); digitalWrite(eyePin, LOW); delay(i*20); } digitalWrite(eyePin, HIGH); delay(1000); // push the fortune card dispenser.step(2 * stepsPerRev); }}\r\n \r\nHappy Halloween!\r\nThis object was made in Tinkercad. https://www.tinkercad.com/things/5VdAqYtO7X